The x-ray Optics Laboratory is the oldest research laboratory of the Physics Department, Federal University of Paraná (UFPR). It was born with the initiative of Prof. César Cusatis in 1969 while working in the resolution of monocrystalline structures using just an X-ray generator, a Weissberger camera and the old IBM1130. From 1973 to 1975 Prof. Cusatis worked on his post-doc in the Bristol University at England, in the x-ray optics area with Prof. M. Hart. Then the laboratory bought the crystal cut machine: the soul of the lab. In 1976 it began working on the instrumentation area developing the first diffractometer double-axis and the SCOPE electronic control system.

In 1980 with the Ph.D. research of Prof. Irineu Mazzaro, a new area was opened: the X-ray interferometer to study the real part of the refraction index. Following year began the project of the National Laboratory of Synchrotron Light (LNLS) in which the LORXI was involved from the beginning. In 1991 it started the building of the XRD-beamline (X-Ray Diffraction beamline) at LNLS under the responsibility of Profs. Cusatis and Mazzaro. They provided the necessary knowledgement in X-ray optics instrumentation for the construction of that beamline. In the same year two new research areas were included in the LORXI: the use of X-ray interferometry to study an imaginary part of refraction index, and the x-ray backdiffraction. In 1998 was initiated the operation of the LNLS with Prof. Cusatis as coordinator of the XRD-beamline. In 2000 the laboratory obtained the 4-circle diffractometer increasing its research equipment and supporting the continuity of the collaborations with internal and external groups of the UFPR. One of the interdisciplinary projects in process, Diffraction Enhanced imaging, involves members of LORXI (UFPR), LIN-COPPE (UFRJ), IF (UFRJ) and LNLS.

The equipment of the laboratory (approx. R$700.000) was supported by the institutions: CNPq, FINEP, Bank of Brazil Foundation and PRONEX, and is used on the development of basic and applicated research projects. The research projects of the LORXI are basically focused on two groups: characterization of material with X-ray and X-ray optics instrumentation. LORXI is a multi-users laboratory has collaborations with researchers of the Chemistry, Engineering, Physics, Chemical And Mechanical Engineering Departments.